228 ANAS MARILA. 



neck and breast, black, spreading round to Die back ; 

 back and scapulars, M'hite, thickly crossed with waving 

 lines of black ; lessee coverts, dusky, powdered with 

 veins of whitish ; primaries and tcrtials, brownish 

 black ; secondaries, white, tipt with black, forming the 

 speculum ; rump and tail-coverts, black ; tail, short, 

 rounded, and of a dusky brown ; belly, white, crossed 

 near the vent with waving lines of ash ; vent, black ; 

 legs and feet, dark slate. 



Such is the colour of the bird in its perfect state. 

 Young birds vary considerably, some having the head 

 black mixed with gray and purple, others the back 

 dusky, with little or no white, and that irregularly 

 dispersed. 



The female has the front and sides of the same white ; 

 head and half of the neck, blackish brown; breast, 

 spreading round to the back, a dark sooty brown, 

 broadly skirted with whitish ; back, black, thinly 

 sprinkled with grains of white ; vent, whitish ; wings 

 the same as in the male. 



The windpipe of the male of this species is of large 

 diameter; the labyrinth similar to some others, though 

 not of the largest kind ; it has something of the shape 

 of a single cockle shell ; its open side, or circular rim, 

 covered with a thin transparent skin. Just before the 

 windpipe enters this, it lessens its diameter at least 

 two-thirds, and assumes a flattish form. 



The scaup duck is well known in England. It 

 inhabits Iceland and the more northern parts of the 

 continent of Europe, Lapland, Sweden, Norway, and 

 Russia. It is also common on the northern shores of 

 Siberia. Is very frequent on the river Ob. Breeds 

 in the north, and migrates southward in winter. It 

 inhabits America as high as Hudson's Bay, and retires 

 from this last place in October.* 



* LATHAM. 



